Lane Lewis wrote:

What is the best way to set your case fans (3-4 fans) all in or
blowing out or somewhere in between


Generally one more fan blowing in than out, taking into consideration the
PSU fan.

This creates a positive pressure in the case.

This depends totally on your environment. In a dusty environment, yours
is a good solution - no air and dust entering case through drive openings.

In a low dust or no dust environment, you *want* cool air flowing over
your drive devices, so exhaust fans should out number input fans, that
is, more fans blowing out than blowing in.